Strut for aeroplanes, &amp;c.



G.- R. E. REMBRS.

STRUT FSR AEROPLANES, @50,

APFLIOATMN FILED JUNE 2a, 1912.

LSL f, Patented Eea. 16,` 1913.

marsan erariale' rari STR'UT FOR AEROPLANES, Sw.

Specication of Letters Patent,

Patented Deca f6, 1911.3.

Application tiled June 28, 1912. Serial No. 7056.481.

To alli vif/1.0m if may concern Be it known that I, Guerin' RUDOLF E.Rinirnns, a citizen of the United States, residing at. Bellingham, inthe county of lVhatcom and Statepf lflvashington, have invented new anduseful Improvements 1n Struts for .ftreroplanes Src., of which thefollowing is a specification. I

This invention relates to struts or similar frame pieces for aeroplanes,hydroplanes, hydroaeroplanes and other high-speed vehicles, and itsobject is to provide a strut or like frame piece which is simple, strongand durable in construction, light in "Weight, and of such form as tooffer minimum head resistance to travel through air orwvater.

The invention consists of the features of construct-ion, combination andarrangement of parts, hereinafter fully described and claiinetl,.reference being had to the accompanying drawing, in Which:- t

Figure l is a fragmentary side elevation of one form of strutconstructed in accordance with my invention. Fig. 2 is a horizontaltransverse section of the same. Fig. 3 is a horizontal transversesection through another form of strut constructed in accord anice withmy invention. F ig. i* is a fragmentary side elevation of the same withthe covering removed.

Referring to Figs. l and 2 of the drawing, l designates the body of thestrut or frame piece, which is shownas centrally and longitudinallydivided from front to rear into counterpart sections 2 and 3, havingfiatten'ed inner faces and preferably provided with curved outer faces.Disposed between said sections 2 and 3 and glued, screwed or otherwisesecured thereto is a board or strip Il, the forward portion 5 of whichprojects a suitable distance in advance of the body, While the rearportion (i thereof projects a somewhat greater distance beyond the rearedge of the body, forming a substantially cross-shaped frame structurein horizontal transverse section. Inclosing this frame structure is anouter covering 7 of fabric, sheet metal or other suitable material,which is folded about said frame structure and has its meeting edgesoverlapping at one side of the body l and suitably secured thereto, asby means of fastenings 8. This construction provides a strut having asmooth outer surface along which the air or Water may lovv Without beingbroken up into eddies or currents and causing excess resistance. The

construction described also provides a strut" of streani-l1ne form,tapering forwardly and rearwardly from a point in. advance of 'itstransverse center, at which point the strut is of greatest transversethickness or dimensions. The air or Water through which the frontportion of the struttravels is, therefore, freely divided and caused to'form a thin film or cushion of air against the sides of the outercovering from the leading edge of the strut to its point of greatesttransverse dimensions, Which film or cushion of air acts to diminishsurface resistance in the Well known way. The air following the courseof the sides of the front portion of the strut is thus compressed to adetermined degree and in itsrearward flow against the converging orconcaved sides of the cover# ing in rear of the transverse center of thestrut reacts or expands to give a forward impetus to the travel of thestrut, thus f urther diminishing head resistance. A strut of thisconstruction is, furthermore, light in Weight, inexpensive ofmanufacture, 'and presents a broad surface adapted to act as a stabilitylin or keel to prevent the aeroplane or other vehicle on which it isused from skidding, making lateral leeway or sliding laterally under airpressure from its deter'- mined course of travel.

In the form of my invention shown in Figs. 3 and 4t, the strut body 9comprises a bar or stanchionv of rectangular form in cross section andWhich is provided with a frame extension consisting of front and rearchanneled or folded metal strips 10 and l1 connected with the body orstanchion by rods` or bolts 1Q and 13, the inner ends of which arethreaded into the body and the outer ends of which are provided Witheyes 1.4L fitted Within the folded strips l0 and 11, and through theWalls of said strips are passed bolts or rivets -15 firmly securing theparts together. About the frame strueture thus formed is arranged acovering 16 of fabric or sheet metal, which may consist of a centralpiece secured to the body in the manner shown in Figs. 1 and 2, or ofone or more strips fastened by they rivets or bolts l5 to the channeledmetal strip.l 10 and 11. This construction provides a strut similar inexternal form and general dimensions to the strut shown in Figs. l and 2and having like characteristics'.

it will be observed that in the const-ructions described a strut isprovided which itl@ 'consists of e central body', core or stanohion,

having en outer covering or sheathing forming e strut- Whieh issubstentieiy torpedd shaped in horizontal transverse section and whichpresents e smooth surface 'for Contact with the sir or Water with eminimum degrae of friction and head resistance.

, Xt will he observed that each of the forms .deseri'bed is of such typeas to enable the 'lt will, of course, be understood that the 9.0il strutis designed to be used in the construe- .'tion of the framework ofeeroplanes7 hydroplenes, hydroaeroplenes and other high speed "sirendlwater vehicles, and that the oonstruetion's disclosed7 Whilepreferred, may be n Loonse? departed from tov a considerable degreewithin the spirit and scope of thefinvention.

Having thus described the inventionjvhet l I claim sis new is:--

A strut for aerophrnes comprising strut proper, av ,trame formed of rodsextending torwardiy and rearwardly from the strut proper, the front rodsbeing of less length than the rem' rods, and seid rods being arranged innlinement Centrally of the strut,

folded frame elements connected with the u enter ends o the rods, and estrip of Insterini enveloping the strut, rods and frame elements, saidstrip forming therewith ai strut of greatest transverse dimensions inadvance oi its transverse center and having its sides respectivelyconverging from such point to its ieed'and trail edges.

- In testimony whereof 'atix Inysigneture in presence of two Witnesses.

GUSTAV RUDOLF E. REMERS. 'Vitnesses F. E. CRAWLEY, NELLIE Ton.

